NFS client issue

[Jason Joines]

Net Llama! wrote:
> On Fri, 26 Jan 2007, Jason Joines wrote:
> 
>>    I have a bunch of boxes backing themselves up to an NFS server.  One
>> of them suddenly stopped working, it can no longer mount the NFS
>> export.  Doesn't seem to be an issue with the server as all the other
>> clients are still working just fine.
>>
>>    The failing client is an old SuSE 8.1 box with a 2.4.19 kernel and
>> the server is OpenSuSE 10.0 with a 2.6.13 kernel.  The output of the
>> failed backup script reports "mount: RPC: Port mapper failure - RPC:
>> Timed out".  portmap is running on the client and I've restarted it but
>> that didn't help.
>>    The other clients are all SuSE with versions ranging from 8.0 to 10.0.
>>
>>    I tried to do the mount manually a few times ( same server but
>> different exports and local mount points ) and each resulted in a hung
>> mount process.  The int option was used each time but none of the mount
>> processes can be killed even those with the soft option.  The mount
>> called from the script does not result in a hang, it just fails.  Only
>> the manual attempts hang and have now been hung for over 18 hours.
>>
>>    Using rpcinfo, the client can list the services registered with RPC
>> on itself and on the server including portmapper, nfs, and mountd.  I'm
>> using TCP.
>>    During one of the mount attempts I logged all the network traffic
>> between the client and the server.  The client contacted portmap on the
>> server and got replies, it then contacted mountd on the server and got
>> replies.  However, it never sent anything to nfs on the server.
> 
> What does this return from the broken system?
> showmount -e $servername
> 



     Thanks, I hadn't run across showmount before.  In this case it 
showed all the exports on the server along with a list of all the hosts 
allowed to mount it including the host name of the broken client.  The 
output was identical on a working client.

     Also, the server does log the mount attempt from the broken client:

Jan 26 08:19:54 siva rpc.mountd: authenticated mount request from 
broken-client:885 for /local/backup/weekly (/local/backup/weekly).

     It's just the client then never tries to connect to nfs on the server.


Jason
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